Eric B Posted April 5, 2007 Report Posted April 5, 2007 Alright, I just bought 2 Lightning Audio PCH-AP4's which iare 2 4" dia. aeroports which I am putting in my box I am currently building and it came with a formula to determine the port length, which I did but something didnt seem right. I'm not sure how to use the formula for 2, the formula is Lv=(8466.4R squared/(Vb)Fb squared) -1.463R Lv= port length in inches Vb=volume of box in cubic feet Fb=tuning frequency R=Radius My box is 4.16551 cu. ft. amd I want it tuned to 30Hz, the ports radius is 2.03, but remember there 2 of them thanks for the help 2007 Chevy HHR LT UNDER CONSTRUCTION 1st Place Loud N Low 2010 MWSPL Finals 3rd Place Xtreme 3 2010 MWSPL Finals
majorpayne Posted April 5, 2007 Report Posted April 5, 2007 I got a length of 14.41 inches to tune to 30 hz
Eric B Posted April 5, 2007 Author Report Posted April 5, 2007 I got a length of 14.41 inches to tune to 30 hz thanks, so each port should be about 7.2 in. long??? And another question, do you think a single 12" Alpine Type-R would be able to handle this size of box for awhile until I get my BTL??? 2007 Chevy HHR LT UNDER CONSTRUCTION 1st Place Loud N Low 2010 MWSPL Finals 3rd Place Xtreme 3 2010 MWSPL Finals
Slinky Posted April 5, 2007 Report Posted April 5, 2007 thats a big box for just one 12. i prolly wouldnt put it in there unless you werent plannin on givin it that much power. Also, i think you make both ports 14.41 inch long. DD M4 Rockford Fosgate P500-4 SoundQubed HDC415 w carbon fiber cap 2 Rockford Fosagate T1675-S XS Power D3400 Under Hood XS Power D5100 in rear Michael Singer 200A Alt Build Log: http://www.stevemeadedesigns.com/board/topic/153901-2012-veloster-update-842013-wall-build-4-15s/
Eric B Posted April 5, 2007 Author Report Posted April 5, 2007 Well each port tube is 12" long, thats the way they came and I'll be giving it about 300watts RMS, you think she'll be fine 2007 Chevy HHR LT UNDER CONSTRUCTION 1st Place Loud N Low 2010 MWSPL Finals 3rd Place Xtreme 3 2010 MWSPL Finals
Eric B Posted April 6, 2007 Author Report Posted April 6, 2007 any other opinions??? 2007 Chevy HHR LT UNDER CONSTRUCTION 1st Place Loud N Low 2010 MWSPL Finals 3rd Place Xtreme 3 2010 MWSPL Finals
Slinky Posted April 6, 2007 Report Posted April 6, 2007 yeah, you should be fine. DD M4 Rockford Fosgate P500-4 SoundQubed HDC415 w carbon fiber cap 2 Rockford Fosagate T1675-S XS Power D3400 Under Hood XS Power D5100 in rear Michael Singer 200A Alt Build Log: http://www.stevemeadedesigns.com/board/topic/153901-2012-veloster-update-842013-wall-build-4-15s/
Eric B Posted April 6, 2007 Author Report Posted April 6, 2007 yeah, you should be fine. thanks, man i thought no one was gunna reply 2007 Chevy HHR LT UNDER CONSTRUCTION 1st Place Loud N Low 2010 MWSPL Finals 3rd Place Xtreme 3 2010 MWSPL Finals
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